Fault 1: The laser intensity drops and the marking is not clear enough
Solution: â‘ Whether the laser resonator changes; fine-tune the resonator lens. Make the output light spot best; â‘¡ The acousto-optic crystal is shifted or the output energy of the acousto-optic power is low; adjust the position of the acousto-optic crystal or increase the working current of the acousto-optic power; The sensitivity is not enough until about 20A: the krypton lamp is aging, replace it with a new one.
Marker failure 2: Krypton lamp cannot be triggered
Solution: â‘ Check all power cables; â‘¡ High-pressure krypton lamp is aging, replace krypton lamp.
Precautions for operating laser laser engraving machine
â‘ It is strictly forbidden to start the laser power supply and Q-switched power supply in the absence of water or abnormal water circulation;
â‘¡ No-load operation of Q power supply is not allowed (that is, the output end of Q-switched power supply is suspended);
â‘¢ If abnormal phenomena occur, first turn off the galvanometer switch and key switch, and then check;
â‘£It is not allowed to start other components before the krypton lamp ignites to prevent the high voltage from entering the damaged components;
⑤ Note that the output end (anode) of the laser power supply is suspended to prevent fire and breakdown with other electrical appliances;
â‘¥ Keep the internal circulating water clean. Clean the water tank regularly and replace with deionized or pure water. [next]
The use and replacement of the krypton lamp of marking machine
Turn off the water cooler and laser power. Open the upper three chamber covers, remove the lamp or crystal to be replaced, put them in after replacement, and install the chamber cover. Turn on the water cooler and the laser power supply, and adjust the laser power supply current to (15-20) A. Place a small piece of wood or black paper between the front diaphragm and the beam expander. The light spot formed by laser ablation should be seen. If not, slightly adjust the three knobs of the front diaphragm holder until the light spot appears.
After the laser is debugged, the three knobs of the front diaphragm holder should be adjusted repeatedly to make the light spot strongest. If the laser is too strong and the brightness is too high to observe, the power supply current can be reduced. Turn off the laser power.
Special attention: the time to replace the krypton lamp. The factory description of the krypton lamp in the laser is that the service life of the krypton lamp is 300 hours, but due to the different conditions of the user, the above time cannot be used as the only basis for the replacement of the krypton lamp. As the use time increases, the luminous efficiency of the krypton lamp decreases, and the laser output also weakens. In order to obtain sufficient laser output, many users increase the current of the laser power supply to enhance the luminescence of the krypton lamp, which accelerates the aging of the krypton lamp. , Forming a vicious circle, sometimes leading to the phenomenon of a blowout. In order to prevent this phenomenon, we suggest users to decide whether to change the krypton lamp according to the following method.
When changing to a new krypton lamp, record the value of the laser power meter during normal marking as the standard current value. When the krypton lamp gradually ages, increase the current output of the laser power supply, but the value of the ammeter should not exceed 1.25 times the standard current value. For example: when the new krypton lamp is marked, the current value is 20A. After using it for a period of time, if the current value is still not normally marked after being adjusted to 25A, the krypton lamp should be replaced.
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